Alarm device.



E. AUPIERO.

ALARM DEVICE.

APPLIOATION FILED 1111x1112, 1912.

Patented Dec. 23, 1913.

UNITED sTATEs PATENT OFFICE.

EMANUEL AUmao, or encontra, New Yonx.

LAB/II DEVICE.

Specication of Letters Patent.

Application and June 12, 1912. semi No. 703,232.

Patented Dec. 23, 1913.

To all whom t may concern:

Be it known that I, EMANUEL AUFIERO, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a new and useful Alarm Device, of which the following is ed to control the speed of an interposed5 spring element, or its equivalent, independently of the velocities of the impulses as imparted by the operator. This and other objects may be attained with the apparatus shown in the accompanying drawing, in which- Figure 1 is a partly sectional view of one embodiment of my invention, and F ig. 2 is a modified form of power applying mechamsm.

A cup-like front casing 5 is adapted to screw on the frame 6 carrying the rotary shaft 14, to which is fastened the diaphragm vibrating crown cam 13; the diaphragm 8-4 is secured to the front casing -5 by means of a ring 7 forced therein. It will be understood that this feature of securing the front casing to the frame G by means of the screw arrangement will permit variation of the distance between diaphragm and crown cam 13, whereby the amplitude of diaphragm vibrations may be easily regulated to produce the required loudness of sound, or to produce the required load condition for the motive power transmitted through a spiral spring, in order that the same may be controlled by the natural frequency of the diaphragm.

A flexible shaft 22, inclosed by casing 24 flexible or rigid, is driven by bevel gear 27, which is driven by the larger bevel gear 26 to which is fastened the crank handle 28. I find it very desirable, that the flexible shaft 22 should enter the casing 25 at an angle to the crank handle 28; so that the power of the operator may be applied vertically thereto, while the Hexible shaft is liable to be connected to the alarm-device in such manner that the greater part of the shaft will rotate in a horizontal plane; said flexible shaft 22 will drive shaft 17, to which 'is fastened one end of a spiral spring 18, the

other end thereof being pivoted to the gear 16 loosely mounted on said shaft 17.

It will be understood that rotation of shaft 17 will eifect the ceiling of spiral spring 18, and that the power of said shaft vwill be applied to rotate shaft 14 through the medium of said spring 1S, gear 16, and gear 15 fastened to shaft 14. If desired a `pawl 20 and ratchet 19 may be used to pre- Vent shaft '17 from yback-turning when the crank 28 is released. I nd that this arrangement will produce a sharp signal of uniform pitch and practically uniform intensity not affected by any difference in velocities of the crank 28: for instance one rotation of the crank may be effected in onefifth of a sec-ond, while the Spring 18 may be adapted to rotate shaft 14 for one comments is secured to frame 6 by a longl threaded oil-cup 11 adapted to screw into said frame 10 and to keep it in place, while the oil channels 12 therethrough will carry the oil from cup 11 to the bearings of shafts 14 and 17. n

In the embodiment of my invention with the crank arrangement, as shown in F ig. 1, the power to the spring 18 may be applied by continuously turning the crank 28, or by partial turning thereof for short signals. In the modification shown in Iig. 2, I find it very desirable to provide pins 46 and 44 against which the crank 45 is made to stop; the bevel gear 48 driven thereby is preferably adapted to rotate only part o-f a turn, and preferably may be-inade a sect-or of a bevel gear. The smaller bevel gear 49, driven by sector 48, carries stem 47 adapted to engage the flexible shaft 43, which engages and rotates shaft 35 supported by frame 32; and a spiral spring 34, one end of which is secured to said shaft and the other end to frame 32, will return shaft 35 and crank 45 to its normal position of rest against stop pin 44. Gear 36, fastened to shaft 35, will engage gear 39 4which is loosely mounted on shaft 37 carrying loosely the crown cam 13 in operative engagement with wear piece 33 shaft 37, and will effect the coiling of a second spiral spring 38 secured to shaft 37 and cam 13 (and corresponding in function to the spiral spring 18 of Fig. l). I ind it very desirable to give short impulses to the crank in the same direction preferably in a vertical direction, as this arrangement will facilitate location of the crank by the operator and will provide very eliicient means for applying power thereto.

It will be noted that the force or power exerted at the handle 28 (or 45) by the muscular efforts of the operator is not applied directly upon the diaphragmactuating member or cam 13, but is transmitted through the interposed resilient member (spring 18 or 38), whereby the irregular, jerky, non-uniform, and intermittent muscular efforts of the attendant serve to put the spring under tension up to the extent where ultimately the inertia of the entire actuating-mechanism (which includes everything from the handle up to the cam 13) has been overcome,whereupon the cam readily overcomes the comparatively slight inertia of the diaphragm and sets the latter into vibration. It will further be noted that the interposed spring (18 or 38) not only transmits but also governs or modulates the human and consequently varying movements imparted at the handle, translating the same into the regular rhythmic and `unvarying movements of the cam and diaphragm; that such interposed spring is at all times free to transmit 'movement to the cam and diaphragm, and will automatically actuate the latter as soon as the inertia at the forward end of the spring has been overcome by the accumulated tension produced by the muscular efforts of the operatorand that the natural frequency of the diaphragm and the tension of the spring react upon each other to produce the regular and rhythmic diaphragm-vibrations that are manifested by the fact that the resultant signal-note is of practically uniform pitch land intensity.

It will be understood by those skilled in the art that the crank 28, or its equivalent, may be attached directly to shaft 17 without the intervening flexible shaft 22; and that many other changes and modifications may be resorted to without departing from the scope of my invention.

What I claim is:

1. A. signaldevice, comprising a diaphragm and means for vibrating the same, a reciprocatory member actuated by the operator, a leXible-shafting reciprocally rotated by said member, and a power-transmitting spring interposed between said shaft and said vibrating-means.

2. A signal-device, comprising the combination of an acoustic diaphragm, mechanism actuated by the operator, a spring adapted to be put under tension by said mechanism, a cam adapted to be rotated by said spring as soon as the tension of the latter exceeds the resistance of said diaphragm, said diaphragm being actuated as aforesaid by the operator through said spring and cam and acting as the sole escapcment for the spring.

3. A signal-device, comprising reciprocating mechanism actuated by the operator, means for translating the movement thereof into intermittent rotary motion in one direction only', a spring adapted to be wound by said rotary motion, a cam driven by said spring, and an acoustic diaphragm vibrated by said cam and acting as the sole escapementtherefor.

EMANUEL AUFIERO.

Witnesses:

JULIUs F. Mouais, ISAAC BROWN. 

